While looking at a cliff, you observe that three visible layers of rocks are tilted about 30 degrees. There are four straight horizontal layers above the tilted layers. Which two principles suggest that the tilted layers are older than the horizontal layers?

Question

Quizplus · Accepted Answer

The principle of original horizontality suggests that layers of sediment are originally deposited horizontally under the action of gravity. The principle of superposition states that in an undeformed sequence of sedimentary rocks, each layer is older than the one above and younger than the one below. These principles together suggest that the tilted layers, being below the horizontal layers and not originally deposited in a tilted position, must be older.

While Looking at a Cliff, You Observe That Three Visible